Hoist crane construction



Jan. 27, 1942. R. J. HARRY HOIST CRANE CONSTRUCTION Filed Jan. 12, 19392 Sheets-Sheet l Jan. 27, 1942. HARRY 2,271,426

HOIST CRANE CONSTRUCTION Filed Jan. 12, 1939 2 Sheets-Sheet 2 yam/2 h,aim

' "UNITED STATES PATENT OF FICE- v y iRobertifiarry, Alliance; Ohio I II innicai an teiy 12; 19sa-s rialN amaq 1 Claiiiisll (c1 inventionrelatesto :hoistfrhe chanisin, and more,particularly,- to new and,improved theist mechanism suitablefor overheadcrane utilization. 1;... av;,;; j

Y In employing hoist. mechanisms suitable for handlin :.and;carryingheavy loadssuch vas 'encountered in theutilization of'a crane,,andparticularly, a traveling crane, it has beencustornary toemploy'interleaving hoist cables for supporting the load and forsuitablyraising and loweringthe load. Hoist cables andtheir associate cloperative mechanismsmust stand considerable strain; stress, and wearwithout dropping the load;,I-Ieretofore, inqemploying a pair of hoist.

drums with suitable :sheaves, the cables; have been interleaved insuchamannerthat reverse bends result. I have found that such .reversebends materially increasewear on the cable and thus, decrease itseffective and efiicient'operative life I have also discovered that sucha type of, bend alsolincreases the strain as .well as :the wear uponthesheaves, drums, and other assoch, ated hoistelements. By reversebends? I'have reference to a relationship of cable portionsb wherein onedrum wheel willbe moved clockwise while an adjacent sheave wheel willbe-moved counter-clockwise. ,That is, a particular, cable hasra reversebend when it is, reevedrforwardly over. one wheeland is reevedbackwardly with. a-change of directionmveran adjacent'wheel withtheresult that-one'wheel must rotate'in an-v opposite direction tothe otherwheel whetheritkis; adrum or asheave. As distinguished fromthis; I reevethe cables-in one direction such asmforwardlyover all" of the wheels;thus eliminating reverse bends. By transverse bends, I haVBIGf erence todirecting or reeving the cable. atzsub-zstantially-right angles to itspreviousdir'ection: And, it has been an object of the presentinventionto devise anew and improved operative arrangement of a hoistingmechanism: r Another object has. been to eliminate reverse to hosselskll d-s n niech nisin, embO dyiiflg the iprinciplesofimv "1 vlentionandthat may be utilized with a traveling crane such as shown in mycopending application Serial N 0,

3.1 and u e-31s a; v l on p me? u fix s 4 1 edit In the drawings I haveforgthe purposetoi illus.

tration disclosed a:travelingcrane; arrangement constructiorrjmay beemployed. The numeral bends in-a hoisting cable,and particularly, whereinterlocked drum gears are employed. vI

A further object has been to provide'a hoist ing mechanism having animproved cable rela- Aistill further object has been to provide animproved, hoist mechanisrn' -fortaefour girde'r craneoonstruction. .0 5v TIheseandmany other objects will appear to t ose skilled in the artfrom the drawings, the description thereof, and the appended:claims;

E t rawin s:

, Eigure. 1 ;-1s a s de viewinielevation ofa:

s ners represents a substantially longitudinally-extend andis pro deadwith a trackrailrll for receiving mounting" such frame with respect. .tothe ssupport girders I0; t In like manner an' auxiliary girder I01"extends substantially longitudinally-and ina spaced-i; apartrelationshipiwith respect to the main'gir'd fl ers Inland-"supports atrack rail H for a's'uita'ble auxiliarylitrollemrif employed. 5111' theembodiment-or my pair ofi1drumsl5 jourmile'd withinbearing pertions1610f the main frame are preferably mount-' t ed in such-a manner thattheir i'otative" ax s on the sameiplane; preferably a horizoiital'planej that extends .transversely with respect to the maintrolley frame.

' Thei'drum's l 5ihave interlocking geais le inesng ingiwith eachotherandalso with driv pin ons I] r-positio'fried adjacent opposite endspai srwrrne pinioris 11 are journaled within suit:

able bearingSQ'IS -"and are drivenby aerive's'h'af-t' I Batthattis;adapted, toiext'end on opposite sides ofione drum pair to connect; itto-asimilar pair on an'opposite side of the machine; "The trans-"versely-exten'ding drive [shafts l8a ma'y be conne ctedgtoga suitablevmotivating mechanism such 250,578, filed January 12,-,l939; jen-, 1 7titled Hoist crane construction, Case D. 1.3

ie re :72,- i aimn i w/ n e at 'sh win a symm tric l; l o a s it b r a eonstruci- ;v tio n -e'mployingg the hoisting'gmechanism iof Fig sdiagrammatic perspective view in; z illustrating cable -or.gropeinterleaving, s

r 111 lines and the other in; dotted' lines; same reference charactershave such as l set I forth in my copending application; above-mentionedIt will however, be apparent.

the artthat any suitable crane ing rnain itr'olley'girder thatispositioned adt-l jacentopposite sides of ;the crane construction vflangewhjeel 12 operably mountedin a house: irig portion Moi the maintrolley frame portion: '13 of a hoist trolley, Carriage, wheels:- 12 arepreferablymounted;- at four transverse side cor-: 5 of the frame l3 foroperably andymovably "invention showng a axes of the sheave wheelspreferably extend in the same direction as the planes representingrotative axes of the drums [5, namely, transversely of the craneconstruction.

In addition to eliminating a number of sheave wheels and associatedcables and connecting portions, and materially simplifying the operativeconstruction, the present arrangement makes possible the utilization oflarge size cables in a highly efiicient and effective manner. Also,safety features are incorporated, preventing dropping of the load incase one cableshould fail. v 9 v The uppersheave wheel construction isjournaled within lower portions of the main frame 13 by suitablebearings 2|. The lower sheave wheel 29 is rotatably mounted by a shaft30 on vertically-extending support arms 26, 2'1, and 3|. The supportarms 26 and 3| extend downwardly through a transversely-extendinglifting or ladle beam 25 and additionally support a laminated ladle hook36 mounted thereon by a pivot pin or shaft 3'1. The support arm 21 issecured to the ladle beam.

A pair of connector pivotally-balan'ced lever arms 32 extendlongitudinally of the direction of movement of the hoist apparatus andare pivotally connected at 33 on opposite sides of an upper end portionof the substantially centrallymounted support arm 3|. As shown, thesheaves 20 and 29 are preferably divided into two parts in order toreceive a pair of interleaving cables,-

ropes, or chains 23; it will thus appear that a failure of one chainwill not permit the hoist construction to drop. In efiect, eachso-called sheave comprises a pair of sheaves whereby a pair of cablesmay be employed. When I speak of cables, I include reference to ropes,chains;

and other suitable means for reeving the drums and sheaves. V

A cable b on the right side of the sheave and drum construction inFigures 1 and Band on the left side of Figure 2, is connected ordead-ended at a righthand side of the connectorarms 32 at 341),referring to Figure 1, leaves over a right v portion of the upper sheave20, viewed from Figures 1 and 3, and then turns downwardly and extendsover a lefthand portion of the lower sheave 29 and again extendsupwardly and connects with the righthand drum I5 viewed from Figures 1and 3. In like manner, a cable a is connected or dead-ended toanoppositepoint 34a of the lefthand arms 32, viewed from Figure 1, andafter interleaving, as shown, with the upper and lower sheave wheels 20and 29, extends upwardly and connects to the lefthand drum 1.5 as viewedfrom Figures 1 and 3. The same arrangement is preferably employed forboth halves of each sheave wheel group and for each of the two connectorarms 32.

'From the above explanation, it will appear that each half of eachsheave wheel group supports a pair of cables a and b which in turnconnect to their respective hoist drums.

When I speak of leaving or interleaving of the ropes or cables in thespecification, I have reference to running the cables over the drums andsheaves, or in other words, reeving them. When I speak of interlockingdrums, Ihave particular reference to the intermeshing of the gears ofthe drums and to the utilization of additional connections such as I Iand 18a in such a manner that the drums will rotate in synchronism andwill prevent dropping the load being hoisted if one part should fail.Since the drums are separately driven by the gears I! as well as by theintermeshing of the drum gears I5, it will be apparent that a breakageof one drive member will not cause a dropping of the load.

In addition, as will appear from the previous description, and as shownparticularly in Figure 2, I preferably provide a pair of ropes or cableswhich reeve with pairs or half portions of upper and lowersheaves 20 and29 as well as-witli the associated intermeshing drums l5.

When I speak of the axis or axes of the drums,

sheaves, motors, etc., I have particular reference to the axis or axesabout which they rotate. r

Although for the purpose of illustration, I have shown the hoistapparatus as employed in connection with a particular type of crane construction, it will be apparent that it may be employed in connectionwith any suitable crane and also that many modifications, additions, andsubtractions, etc., may be made in the hoist con struction shown anddescribed without departing from the spirit and scope of the inventionas indicated by the appended claims.

I claim: v j

1. In a hoist mechanism having a suitable frame, a pair of hoistin drumsoperably'moun't ed on said frame and having a portion of their axes in aside-by-side relationship, said drums having operably intermeshed drum'gears,-"a hoisting sheave means operably mountedon said frame andhaving a rotatable axis extending in' substantially the same directionas the abovementioned portion of the axes of said drums, 'anotherhoisting sheave means operably mounted at one end thereof'to anextending portion of said carrier, each said cable means reeving'overone of said drums and its associated sheave means in such a manner thateach of said drums will turn in the same direction as its associatedsheave means. x 2. In a hoisting apparatus having a suitable frame, apair of rotatable hoisting drums having a portion of their axesin aside-by-side relationship, each of said drums having a gear, said gearsbein operably intermeshed, said drums being operably mounted on saidframe, a pair of hoist; ing sheaves associated with each of said drums,the rotatable axes of said drums and gearsextending in the samedirection with respect'to each other, hoisting means operably with'outany reverse bends from and to-end of the hoisting means reeving one ofsaid drums; and its associated sheaves for rotation in the samedirection with each other, and means operably without any reversebends-from end to'endof tlie hoisting means reeving the other drum'and.its associated sheaves for rotation in thesame direc-' tion with eachother and'for rotationin mo posite direction with respect to saidfirst-mentioned drum and its associated sheaves. 1

3. In a hoisting apparatus, a pair of rotatable hoisting drums having aportion of their. axes-in a side-by-side relationship, said drums beingop-' erably intermeshed, a sheave associated with each of saiddrums,'said sheaves having a portion of their axes in asubstantiallyend-to-end relationship with respect to each other, saidportions of the sheave axes extending in substantially the samedirection as the above-mentioned portions of the drum axes, meansoperably reeving one drum with its associated sheave for rotation in thesame direction therewith, and means operably reeving the other drum withits associated sheave for rotation in the same direction therewith, eachof said reeving means being deadended substantially midway between saidsheaves.

4. In a hoisting apparatus having a frame, a

pair of hoisting drums, each drum having a gear, said drums beingoperably intermeshed through said gears and having a portion of theiraxes in a side-by-side relationship, said drums being mounted on saidframe adjacent a side thereof, a sheave associated with each of saiddrums, said sheaves having a portion of their axes extending insubstantially the same direction as the abovementioned portions of thedrum axes, means reeving each drum with its associated sheave offnon-opposed outside portions of each of said drums, a lifting beam, andmeans operably con-. necting both of said sheaves to said lifting beamadjacent one and the same end thereof.

5. In a hoisting apparatus having a suitable frame adapted to be movedlongitudinally, a pair of rotatable and intermeshing hoisting drums onsaid frame having a portion of their axes ina side-by-side relationship,such portions of the drum axes extending substantially transversely ofthe longitudinal direction of movement of the frame, sheaves having aportion of their axes extending in substantially the same direction asthe above-mentioned portions of the drum axes, a lifting beam extendingsubstantially transversely of the direction of movement of the frame,means reeving said sheaves with'said drums, and means associated withsaid reeving means for connecting each of said drums to said liftingbeam adjacent one and the same end thereof.

6. In a hoisting mechanism having a suitable frame, spaced-apart pairsof rotatable hoisting drums, each pair having a portion of their axes Iin such a manner that each itsnassociated sheave and connecting eachdrum of the other pair to said lifting beam adjacent an'opposite endthereof.

' 7. In a hoisting mechanism having a suitable frame, a pair ofh'oisting drums. operably and rotatably mounted on said frameand havinga portion of their axes in a side-by-side' relationship, said drumshaving gears operably interm'eshed with respect to each other, a pair ofhoisting sheave means for one of said drums, one sheave means of saidpair being operably'mounted beneath the associated drum, the othersheave means of said-pair-being operably mounted beneath such associateddrum and beneath said first-mentioned sheave means, a pair of h'oistingsheave means for the other drum of said pair, said last-mentioned sheavemeans pair being mounted in the same manner with respect to itsassociated drum as said first-mentioned sheave means pair with respectto the first-mentioned drum, the rotatable axis of each of said drumsextending in the same direction as the operable axes of an associatedsheave means pair, a member for holding a load to be hoisted, a carrierhaving a portion connected to said member, said carrier extendingoutwardly from its connected portion substantially transversely thereof,and. means having portions operably reeving over each drum and anassociated sheave means pair and being positioned on said carrier ofsaid drums will turn in the same direction as its associated pair ofsheave means when actuated to raise or lower said member. 7

8. In a hoisting appara us, a pair of rotatable hoisting drums having aportion of their axes in a side-by-side relation, each drum having agear, said drums being operably intermeshed through said gears, a pairof sheaves associated with each of said drums, the sheaves associatedwith one of said drums having a portion of their operating axes in asubstantially end-to-end relationship with a portion of the operatingaxes of the sheaves associated with the other of said drums, saidportions of the sheave axes extending in substantially the samedirection as the above-mentioned portions of the drum axes, meansoperably reeving one drum and its associated sheaves for rotation in thesame direction with 'each other, and means operably reeving the otherdrum with its associated sheaves for rotation in the same direction witheach other,

in a side-by-side relationship, each drum having a gear, the drums ofeach drum pair being operably intermesh'ed through said gears, at leastone hoisting sheave associated with each drum of each pair, a liftingbeam, means operably reeving a drum of one pair with an associatedsheave for rotation in the same directiontherewith and connecting saiddrum to said lifting beam adjacent one end thereof, means operablyreeving the other drum of said pair with its associated sheave forrotation in the same direction therewith and for rotation in anopposite. direction with respect to the first-mentioned drum and itsassociated sheave, said last-mentioned means connecting said other drumto said lifting beam adjacent the same end thereof as saidfirst-mentioned drum, and means in the same manner operably reeving eachdrum of the other pair with 9. In a hoisting mechanism having a suitableframe, spaced-apart pairs of rotatable hoisting drums operably mountedon said frame, each pair having a portion of their axes in aside-by-side relationship, each drum having a gear, the drums of eachdrum pair being operably intermeshed through said gears, hoisting sheavemeans operably associated with the drums of one pair, hoisting sheavemeans operably associated with the drums of the other pair, theoperating axes of said drums and sheaves extending in substantially thesame direction with respect to each other, a lifting beam, means havingportions operably reeving each drum of each pair with an associatedsheave means and connecting each of said drums to said lifting beamadjacent an end thereof in such a manner that each drum and itsassociated sheave means will turn in the same direction with each other,each drum of one pair being connected to said lifting beam adjacent oneend thereof, each drum of the other pair being connected to said liftingbeam adjacent an opposite end thereof.

10. In a hoisting apparatus as defined in claim 4, wherein eachsheaveand its associated drum will rotate in the same direction withrespect to each other and in an opposite direction with respect to theother drum and its associated sheave means.

11. In a hoisting apparatus having a frame, a pair of hoisting drums,each drum having a gear, said drums being operably intermesh'ed throughsaid gears and having a portion of their axes in a side-by-siderelationship, said drums being 0perably mounted on said frame adjacent aside thereof, a sheave means associated with each of said drums, bothsaid sheave means having a portion of their axes extending insubstantially the same direction as the above-mentioned portion of thedrum axes, means reeving each drum with its associated sheave means offnon-opposed outside portions of each of said drums in such a manner thateach sheave means and its associated drum will rotate in the samedirection with respect to each other and in an opposite direction withrespect to the other drum and its associated sheave means, a liftingmember, and. means operably connecting both of said sheave means to saidlifting member adjacent one and the same side of the frame, wherein eachsaid sheave means comprises a pair of spaced sheaves.

ROBERT J. HARRY.

